Thermostatic control for stove ovens



June 17, 1930.

A. H TINNERMAN 1,764,765

THERMOSTATIC CONTROL FOR STOVE OVENS Filed May 5, 1928 2 Sheets-Sheet 1 mw, Maw, 9 71M throw June 17, 1930.

A. H. TINNERMAN 1,764,765 THERMO STATIC CONTRbL FOR STOVE OVENS Fil ed May 5, 1928 2 Sheets-Sheet 2 3 mn'ntoz Patented June 1 7, 1930 UNITED STATES ALBERT H. 'IINLTERMAN, OF CLEVELAND, OHIO THERMOSTATIO CONTROL FOR STOVE OVENS Application filed May 5, 1928. Serial no.'275,s15.

. only one heatzone of the oven is in contact therewith. It is more desirable to extend thev thermostat from front to rear, where it is subjected tothe average of heat zones, since the rear portion of the. oven is usually hotter than the front portion.

When the thermostatic device extends from front to rear, then it is necessary to utilize a controlling member or regulator which is disposed on the front part of the oven. Such anrangement is illustrated in Letters Patent of the United States No. 1,578,939, which were issued to me March 30th, 1926. In such patent, the door frame has an opening through which access may be had to the controlling member by means of a key. Some difliculty is apt to be experienced in this type of installation, particularly if the door opening does not exactly register with the control member;

and in addition, the user is apt to find it inconvenient if the key should be lost.

A further objection to this arrangement 1s the fact that the dial must be fastened onto the door frame. Such doors usually embody an enameled surface, and hence there is danger of cracking the enamelwhen the*dials are applied thereto. 1

An object of the present invention is to utilize a thermostat which extends from the front to the rear of an oven, and at the same time to make a controlling member which can be readily operated from the front of the oven without requiring the dial to be fastened onto an enameled surface, and without necessitating the removal of the key to permit opening of the door.

In the drawings, I have shown one form of my invention in Fig. 1, which embodies a vertical section through the oven of a gas range, and shows a thermostat extending from the front to the rear; Fig. 2 is a front elevation'of part of the oven; Fig. 3 is a front elevation of part of the oven, showing a modified formof my invention, and Flg. 4 is a vertical section taken through the oven on a plane indicated by the line 4-4 in Fig. 3.

Referring now to Fig. 1, 10 designates an oven of a gas range having a thermostat 11 mounted therein, and extending from the front to the rear of the oven. Thev details of construction of the thermostat, as illustrated in this figure, are shown in my Patent No. 1,57 8,939, heretofore referred to, and hence, for the present purpose, it will only be necessary to state. that the thermostat embodies an adjustable regulating member 15, which projects through an opening in the oven front frame member 16, and has a key 17 disposed outside the door 18, and that the door hasan opening 19 of sufficient size to permit opening thereof without requiring the key to be' removed. lDirectly behind the key, I have shown a dial 20 which is mounted on a lug 21. This lug forms partof the frame and is of suchsize as to provide a satisfactory bearing for the rotatable member 15. The dial, as shown, is substantially flush with the outer surface of the door frame, and'hence is readily visible and available for use.

In Fig. 3, instead of cutting an opening through the door frame, I h vs shown such frame as having a recess 25 a jacent the corner portion, and as havin the dial substantially fiush with the oven ront frame. This is shown more in detail in Fi .4, wherein the dial is illustrated at 20, an theoven front frame is indicated at 16*. Thus the dial and key lie substantially within the continuation of lines, which define the mar inal edges of the top and side edges of the oor.

-An' important advantage of my invention, as is evident from the description. and illustration in the drawings, is the fact that the thermostatic controlling or regulating member may be mounted adjacent the front of the oven and may be readily adjusted b means of a key which is attached permanent y thereto. The dial being flush with the oven front frame or door is relatively inconspicuous, and yet .is accessible for enabling adjustments to be quickly made. In addition, the dial may be easily attached, without endangering the appearance of the enameled surfaces.

claim:

In a stove, the combination with an oven structure having a front frame member and a door, a thermostatic control device mounted within the oven, and having an o eratin portion thereof projecting throng the frame member, a dial mounted on the member, a key associated with said operating portion, and positioned in front of the dial outside the oven, said door having an opening suflicient to clear the dial and key when the door is opened.

In testimony whereof, I hereunto afiix my signature.

ALBERT H. TINNERMAN. 

